Program testing can be used to show the presence of bugs, but never to show their absence!
文学是民族的记忆,没有记忆就没有身份。
Data is the new oil. It's valuable, but if unrefined it cannot really be used. It has to be changed into gas, plastic, chemicals, etc to create a valuable entity that drives profitable activity; so must data be broken down, analyzed for it to have value.